QIBT 1201BPS MATHS 1A Homework - Solutions These questions are based the week 1 lectures and part of the first lecture in week 2 corresponding parts of printed notes You should bring your notes a writing pad and a calculator to each problem class. All the questions for this week are key questions Question 1 In the diagram below (a) What is the relationship between the vectors AB and CD ? (b) What is the relationship between the vectors BC and ED (c) Simplify the sum BC + CD + DE to a single vector. (d) Simplify the sum AB + BC + CD + DE to a single vector. (e) What is the vector BE – DE ? (give a reason) (f) Express BD in terms BC and CD (g) Use (f) to find an expression for CD Question 2 This diagram shows two forces pulling upwards on a heavy ball. Copy the diagram below into your book. Homework Solutions 1

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(a) Use the triangle rule to calculate the vector A + B (b) Use the parallelogram rule to calculate the same vector ( A + B ) and check that you get the same answer (c) Use another diagram and draw on it the vectors

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